From: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Date: Thu, 8 Dec 2016 15:16:21 +0000 (-0500)
Subject: mkosi: increase buffer size when hashing files
X-Git-Tag: v2~33^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F45%2Fhead;p=thirdparty%2Fmkosi.git

mkosi: increase buffer size when hashing files

We need to do some buffering here, because the files we are hashing can be gigabytes
in size, but Python loops are slow, so it's better to use a larger buffer.
---

diff --git a/mkosi b/mkosi
index 35db5bc60..e3f325655 100755
--- a/mkosi
+++ b/mkosi
@@ -1074,7 +1074,7 @@ def copy_nspawn_settings(args):
     return f
 
 def hash_file(of, sf, fname):
-    bs = 65536
+    bs = 16*1024**2
     h = hashlib.sha256()
 
     sf.seek(0)